I just heat treated my ever blade (1084 with a little vanadium) today, file skated before tempering. And immediately I stuck it in the forge that still had glowing red bricks in it! It was the end of the class period so I wasn't thinking, and just looked at the thermostat, it said 400. But what I really looked at was what I set it to, it was probably still at 1500 degrees. So I come back in 1.5 hours and the forge says 500 degrees actual temperature. Test the blade with a file, and it cuts really well 
. Is there anything I should do to the blade before I heat treat again tommorow? (Normalize to reduce the grain growth from heat treating? Or is that negligable?)
. Is there anything I should do to the blade before I heat treat again tommorow? (Normalize to reduce the grain growth from heat treating? Or is that negligable?)
. If it were me, I would go ahead re-heat treat and get those carbides back into solution then quench. 1084 is pretty forgiving. Only concern would be that it got to 1500 but I doubt your blade reached that so it was in a sense, normalizing heat. Someone else who has more heat treating experience weigh in if this is incorrect.